MIC39100 Micrel Semiconductor, MIC39100 Datasheet

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MIC39100

Manufacturer Part Number
MIC39100
Description
1A Low-Voltage Low-Dropout Regulator
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
The MIC39100, MIC39101, and MIC39102 are 1A low-
dropout linear voltage regulators that provide low-voltage,
high-current output from an extremely small package. Utiliz-
ing Micrel’s proprietary Super eta PNP™ pass element, the
MIC39100/1/2 offers extremely low dropout (typically 410mV
at 1A) and low ground current (typically 11mA at 1A).
The MIC39100 is a fixed output regulator offered in the
SOT-223 package. The MIC39101 and MIC39102 are fixed
and adjustable regulators, respectively, in a thermally en-
hanced power 8-lead SOP (small outline package).
The MIC39100/1/2 is ideal for PC add-in cards that need to
convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to
1.8V. A guaranteed maximum dropout voltage of 630mV over
all operating conditions allows the MIC39100/1/2 to provide
2.5V from a supply as low as 3.13V and 1.8V from a supply
as low as 2.43V.
The MIC39100/1/2 is fully protected with overcurrent limiting,
thermal shutdown, and reversed-battery protection. Fixed
voltages of 5.0V, 3.3V, 2.5V, and 1.8V are available on
MIC39100/1 with adjustable output voltages to 1.24V on
MIC39102.
For other voltages, contact Micrel.
Typical Applications
Super eta PNP is a trademark of Micrel, Inc.
June 2000
MIC39100/39101/39102
3.3V
V
IN
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
2.5V/1A Regulator
IN
MIC39100
GND
OUT
10 F
tantalum
2.5V
SHUTDOWN
ENABLE
2.5V/1A Regulator with Error Flag
3.3V
V
IN
Ordering Information
Part Number
MIC39100-1.8BS
MIC39100-2.5BS
MIC39100-3.3BS
MIC39100-5.0BS
MIC39101-1.8BM
MIC39101-2.5BM
MIC39101-3.3BM
MIC39101-5.0BM
MIC39102BM
IN
EN
MIC39101
GND
100k
OUT
FLG
1
Features
• Fixed and adjustable output voltages to 1.24V
• 410mV typical dropout at 1A
• 1A minimum guaranteed output current
• 1% initial accuracy
• Low ground current
• Current limiting and thermal shutdown
• Reversed-battery protection
• Reversed-leakage protection
• Fast transient response
• Low-profile SOT-223 package
• Power SO-8 package
Applications
• LDO linear regulator for PC add-in cards
• PowerPC™ power supplies
• High-efficiency linear power supplies
• SMPS post regulator
• Multimedia and PC processor supplies
• Battery chargers
• Low-voltage microcontrollers and digital logic
R1
1A Low-Voltage Low-Dropout Regulator
Ideal for 3.0V to 2.5V conversion
Ideal for 2.5V to 1.8V conversion
Voltage
10 F
tantalum
1.8V
2.5V
3.3V
5.0V
1.8V
2.5V
3.3V
5.0V
Adj.
MIC39100/39101/39102
Error
Flag
Output
2.5V
Junction Temp. Range
SHUTDOWN
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
–40 C to +125 C
ENABLE
1.5V/1A Adjustable Regulator
2.5V
V
IN
IN
EN
MIC39102
GND
MIC39100/39101/39102
OUT
ADJ
R1
R2
Package
SOT-223
SOT-223
SOT-223
SOT-223
SOP-8
SOP-8
SOP-8
SOP-8
SOP-8
10 F
tantalum
Micrel
1.5V

Related parts for MIC39100

MIC39100 Summary of contents

Page 1

... SOT-223 package. The MIC39101 and MIC39102 are fixed and adjustable regulators, respectively thermally en- hanced power 8-lead SOP (small outline package). The MIC39100/1/2 is ideal for PC add-in cards that need to convert from standard 5V to 3.3V, 3.3V to 2.5V or 2.5V to 1.8V. A guaranteed maximum dropout voltage of 630mV over all operating conditions allows the MIC39100/1/2 to provide 2 ...

Page 2

... MIC39100/39101/39102 Pin Configuration OUT 3 FLG 4 MIC39101-x.x Fixed SOP-8 (M) Pin Description Pin No. Pin No. Pin No. MIC39100 MIC39101 MIC39102 5–8 5–8 TAB MIC39100/39101/39102 GND TAB GND OUT MIC39100-x.x Fixed SOT-223 (S) 8 GND 7 GND 6 GND ...

Page 3

... V 8V –2 IN 16V 0.06 0.5 IN 1A, 0.2 40 100 140 200 250 275 330 500 550 410 630 400 4 6 1.8 2.5 0.8 2. 0.01 210 300 400 93 99.2 1 MIC39100/39101/39102 Micrel Units ppm ...

Page 4

... OUT IN Note 11. Thermal regulation is defined as the change in output voltage at a time t after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 200mA load pulse at V MIC39100/39101/39102 Condition Note 10 Note 7 depends upon the printed circuit layout. See “Applications Information.” ...

Page 5

... TEMPERATURE ( C) Ground Current vs. Output Current 1.8V 2. 200 400 600 800 1000 OUTPUT CURRENT (mA) Ground Current vs. Supply Voltage (3.3V) 1.4 1.2 1.0 I LOAD =100mA 0.8 0.6 I LOAD =10mA 0.4 0 SUPPLY VOLTAGE (V) MIC39100/39101/39102 ...

Page 6

... TEMPERATURE ( C) Error Flag Pull-Up Resistor FLAG HIGH (OK FLAG LOW 1 (FAULT) 0 0.01 0 100 100010000 RESISTANCE (k ) MIC39100/39101/39102 Ground Current vs. Temperature 1.0 0.8 I LOAD 10mA = 0.6 3.3V 2.5V 0.4 0.2 1.8V 0 -40 - 100 120 TEMPERATURE ( C) Output Voltage vs. Temperature 3.40 Typical 3.3V 3.35 Device 3 ...

Page 7

... MIC39100/39101/39102 Functional Characteristics Load Transient Response V = 2.5V OUT OUT TIME (250 s/div.) June 2000 1A 100mA Line Transient Response V = 2.5V OUT OUT TIME (25 s/div.) 7 Load Transient Response V = 2.5V OUT OUT 1A 10mA TIME (500 s/div.) MIC39100/39101/39102 Micrel ...

Page 8

... MIC39101 MIC39101 Fixed Regulator with Flag and Enable Block Diagram IN EN MIC39102 MIC39100/39101/39102 OV I 1.240V 18V Thermal Shut- down GND MIC39100 Fixed Regulator Block Diagram 1.180V 1.240V Ref. Thermal Shut- down 1.240V Ref. Thermal Shut- down MIC39102 Adjustable Regulator Block Diagram ...

Page 9

... To convert down to 2.5V or 1.8V without operating in dropout, NPN- based regulators require an input voltage of 3.7V at the very least. The MIC39100 regulator will provide excellent perfor- mance with an input as low as 3.0V or 2.5V respectively. This gives the PNP based regulators a distinct advantage over older, NPN based linear regulators ...

Page 10

... POWER DISSIPATION (W) Figure 4. Copper Area vs. Power-SOP Power Dissipation MIC39100/39101/39102 sink thermal resistance) and resistance). Using the power SOP-8 reduces the allows the user to reduce V OUT (junction-to-ambient thermal resistance) is the limiting R1 JA factor in calculating the maximum power dissipation capabil- ...

Page 11

... C and the power dissipation is as above, 836mW, the curve in Figure 5 shows that the required area of copper is 160mm The JA depending upon the availability of copper ground plane to · I GND which it is attached. 11mA this package is ideally 63 C/W, but it will vary MIC39100/39101/39102 Micrel ...

Page 12

... This information is believed to be accurate and reliable, however no responsibility is assumed by Micrel for its use nor for any infringement of patents or other rights of third parties resulting from its use. No license is granted by implication or otherwise under any patent or patent right of Micrel Inc. MIC39100/39101/39102 3.15 (0.124) 2.90 (0.114 ...

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